Master Rest Parameters with Destructuring in JavaScript

Simplify your function arguments and improve readability with rest parameters and destructuring in ES6

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JavaScript’s evolution has brought numerous features to help developers write cleaner and more efficient code. Among these are rest parameters and destructuring assignments introduced in ECMAScript 2015 (ES6). Combining these two powerful concepts allows you to handle dynamic numbers of arguments easily while improving overall code readability.

This guide will walk you through using rest parameters with destructuring in JavaScript.

What are Rest Parameters?

Before diving into combining rest parameters with destructuring, it is essential first to understand what each concept means individually. Rest parameters allow functions to accept any number of arguments as an array-like object.

They replace the need for handling arguments objects manually or specifying multiple parameter names separated by commas. Here's how they look like:

function sum(...numbers) {
  return numbers.reduce((accumulator, currentValue) => accumulator + currentValue);
}

sum(1, 2, 3, 4); // Output: 10